Virtual immersions and minimal hypersurfaces in compact symmetric spaces
Virtual immersions and minimal hypersurfaces in compact symmetric spaces
复制标题
紧凑对称空间中的虚拟沉浸和最小超曲面
DOI:
10.1007/s00526-020-01854-x
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发表时间:
2020
影响因子:
2.1
通讯作者:
Radeschi, Marco
中科院分区:
文献类型:
--
作者:
Mendes, Ricardo A.;Radeschi, Marco
We show that closed, immersed, minimal hypersurfaces in a compact symmetric space satisfy a lower bound on the index plus nullity, which depends linearly on their first Betti number. Moreover, if either the minimal hypersurface satisfies a certain genericity condition, or if the ambient space is a product of two CROSSes, we improve this to a lower bound on the index alone, which is affine in the first Betti number. To prove these results, we introduce a generalization of isometric immersions in Euclidean space. Compact symmetric spaces admit (and in fact are characterized by) such a structure withskew-symmetricsecond fundamental form.
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